DTC P2100, P2102, or P2103
Diagnostic Instructions
DTC Descriptor
DTC P2100 04: Intake Air Flow Valve Control
Circuit Open
DTC P2102 02: Intake Air Flow Valve Control
Circuit Short to Ground
DTC P2103 01: Intake Air Flow Valve Control
Circuit Short to Battery
Diagnostic Fault Information
|
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
|
Control X
|
P2102 02, P2101 03
|
P2100 04, P2101 54
|
P2103 01
|
P2101 59, P2101 39, P2101 51, P2101 52
|
|
Control Y
|
P2102 02, P2101 03
|
P2100 04, P2101 54
|
P2103 01
|
P2101 59, P2101 39, P2101 51, P2101 52
|
Circuit/System Description
A throttle plate actuator is used to achieve high exhaust gas
recirculation rates. It increases the pressure difference between
exhaust and inlet so that the appropriate exhaust quantity can be
mixed with the inlet air. The engine control module (ECM)
transmits the desired angle as a PWM signal to the throttle plate
actuator. The throttle plate actuator operates the DC motor to
control the throttle plate based on the PWM signal from the ECM.
The throttle plate position is monitored by an internal position
sensor.
Conditions for Running the DTC
| • |
The ignition is ON or the engine is running. |
| • |
The throttle actuator motor is commanded ON or
OFF. |
| • |
The ignition voltage is less than 16 V. |
| • |
The DTCs run continuously when the above
conditions are met. |
Conditions for Setting the DTC
The ECM detects an open, short to ground, or a short to voltage
on the throttle actuator control circuit for greater than
1 s.
Action Taken When the DTC Sets
DTCs P2100, P2102 and P2103 are Type A DTCs.
Conditions for Clearing the DTC
DTCs P2100, P2102 and P2103 are Type A DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Ignition ON, command the Q38 Throttle Body ON and
OFF with a scan tool. The throttle blade should respond to the scan
tool commands.
- Observe the scan tool DTC information parameter.
DTCs P2100, P2101, P2102 or P2103 should not set.
- Operate the vehicle within the Conditions for Running
the DTC to verify the DTC does not reset. You may also operate the
vehicle within the conditions that you observed from the Freeze
Frame/Failure Records data.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the
Q38 Throttle Body.
- Ignition ON, connect a test lamp between control
circuit terminal 2 and ground. The test lamp should
illuminate.
| ⇒ |
If the test lamp does not illuminate, test the
control circuit for a short to ground or an open/high resistance.
If the circuit tests normal, replace the K20 Engine Control
Module. |
- Ignition ON, connect a test lamp between control
circuit terminal 6 and ground. The test lamp should
illuminate.
| ⇒ |
If the test lamp does not illuminate, test the
control circuit for a short to ground or an open/high resistance.
If the circuit tests normal, replace the K20 Engine Control
Module. |
- Ignition OFF, disconnect the harness connector X1 at
the K20 Engine Control Module.
- Ignition ON, connect a test lamp between the control
circuit terminal 6 and ground. The test lamp should not
illuminate.
| ⇒ |
If the test lamp illuminates, test the control
circuit for a short to voltage. If the circuit tests normal,
replace the K20 Engine Control Module. |
- Ignition ON, connect a test lamp between the control
circuit terminal 2 and ground. The test lamp should not
illuminate.
| ⇒ |
If the test lamp illuminates, test the control
circuit for a short to voltage. If the circuit tests normal,
replace the K20 Engine Control Module. |
- If all circuits test normal, replace the
Q38 Throttle Body.
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
